1 files changed, 226 insertions, 0 deletions
diff --git a/gfx/angle/src/tests/gl_tests/DrawElementsTest.cpp b/gfx/angle/src/tests/gl_tests/DrawElementsTest.cpp
new file mode 100755
index 000000000..91f3c1e9a
--- /dev/null
+++ b/gfx/angle/src/tests/gl_tests/DrawElementsTest.cpp
@@ -0,0 +1,226 @@
+//
+// Copyright 2015 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// DrawElementsTest:
+//   Tests for indexed draws.
+//
+
+#include "test_utils/ANGLETest.h"
+
+using namespace angle;
+
+namespace
+{
+
+class DrawElementsTest : public ANGLETest
+{
+  protected:
+    DrawElementsTest() : mProgram(0u)
+    {
+        setWindowWidth(64);
+        setWindowHeight(64);
+        setConfigRedBits(8);
+        setConfigGreenBits(8);
+    }
+
+    ~DrawElementsTest()
+    {
+        for (GLuint indexBuffer : mIndexBuffers)
+        {
+            if (indexBuffer != 0)
+            {
+                glDeleteBuffers(1, &indexBuffer);
+            }
+        }
+
+        for (GLuint vertexArray : mVertexArrays)
+        {
+            if (vertexArray != 0)
+            {
+                glDeleteVertexArrays(1, &vertexArray);
+            }
+        }
+
+        for (GLuint vertexBuffer : mVertexBuffers)
+        {
+            if (vertexBuffer != 0)
+            {
+                glDeleteBuffers(1, &vertexBuffer);
+            }
+        }
+
+        if (mProgram != 0u)
+        {
+            glDeleteProgram(mProgram);
+        }
+    }
+
+    std::vector<GLuint> mIndexBuffers;
+    std::vector<GLuint> mVertexArrays;
+    std::vector<GLuint> mVertexBuffers;
+    GLuint mProgram;
+};
+
+// Test a state desync that can occur when using a streaming index buffer in GL in concert with
+// deleting the applied index buffer.
+TEST_P(DrawElementsTest, DeletingAfterStreamingIndexes)
+{
+    // Init program
+    const std::string &vertexShader =
+        "attribute vec2 position;\n"
+        "attribute vec2 testFlag;\n"
+        "varying vec2 v_data;\n"
+        "void main() {\n"
+        "  gl_Position = vec4(position, 0, 1);\n"
+        "  v_data = testFlag;\n"
+        "}";
+
+    const std::string &fragmentShader =
+        "varying highp vec2 v_data;\n"
+        "void main() {\n"
+        "  gl_FragColor = vec4(v_data, 0, 1);\n"
+        "}";
+
+    mProgram = CompileProgram(vertexShader, fragmentShader);
+    ASSERT_NE(0u, mProgram);
+    glUseProgram(mProgram);
+
+    GLint positionLocation = glGetAttribLocation(mProgram, "position");
+    ASSERT_NE(-1, positionLocation);
+
+    GLint testFlagLocation = glGetAttribLocation(mProgram, "testFlag");
+    ASSERT_NE(-1, testFlagLocation);
+
+    mIndexBuffers.resize(3u);
+    glGenBuffers(3, &mIndexBuffers[0]);
+
+    mVertexArrays.resize(2);
+    glGenVertexArrays(2, &mVertexArrays[0]);
+
+    mVertexBuffers.resize(2);
+    glGenBuffers(2, &mVertexBuffers[0]);
+
+    std::vector<GLuint> indexData[2];
+    indexData[0].push_back(0);
+    indexData[0].push_back(1);
+    indexData[0].push_back(2);
+    indexData[0].push_back(2);
+    indexData[0].push_back(3);
+    indexData[0].push_back(0);
+
+    indexData[1] = indexData[0];
+    for (GLuint &item : indexData[1])
+    {
+        item += 4u;
+    }
+
+    std::vector<GLfloat> positionData;
+    // quad verts
+    positionData.push_back(-1.0f);
+    positionData.push_back(1.0f);
+    positionData.push_back(-1.0f);
+    positionData.push_back(-1.0f);
+    positionData.push_back(1.0f);
+    positionData.push_back(-1.0f);
+    positionData.push_back(1.0f);
+    positionData.push_back(1.0f);
+
+    // Repeat position data
+    positionData.push_back(-1.0f);
+    positionData.push_back(1.0f);
+    positionData.push_back(-1.0f);
+    positionData.push_back(-1.0f);
+    positionData.push_back(1.0f);
+    positionData.push_back(-1.0f);
+    positionData.push_back(1.0f);
+    positionData.push_back(1.0f);
+
+    std::vector<GLfloat> testFlagData;
+    // red
+    testFlagData.push_back(1.0f);
+    testFlagData.push_back(0.0f);
+    testFlagData.push_back(1.0f);
+    testFlagData.push_back(0.0f);
+    testFlagData.push_back(1.0f);
+    testFlagData.push_back(0.0f);
+    testFlagData.push_back(1.0f);
+    testFlagData.push_back(0.0f);
+
+    // green
+    testFlagData.push_back(0.0f);
+    testFlagData.push_back(1.0f);
+    testFlagData.push_back(0.0f);
+    testFlagData.push_back(1.0f);
+    testFlagData.push_back(0.0f);
+    testFlagData.push_back(1.0f);
+    testFlagData.push_back(0.0f);
+    testFlagData.push_back(1.0f);
+
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mIndexBuffers[0]);
+    glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(GLuint) * indexData[0].size(), &indexData[0][0],
+                 GL_STATIC_DRAW);
+
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mIndexBuffers[2]);
+    glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(GLuint) * indexData[0].size(), &indexData[0][0],
+                 GL_STATIC_DRAW);
+
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mIndexBuffers[1]);
+    glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(GLuint) * indexData[1].size(), &indexData[1][0],
+                 GL_STATIC_DRAW);
+
+    // Initialize first vertex array with second index buffer
+    glBindVertexArray(mVertexArrays[0]);
+
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mIndexBuffers[1]);
+    glBindBuffer(GL_ARRAY_BUFFER, mVertexBuffers[0]);
+    glBufferData(GL_ARRAY_BUFFER, sizeof(GLfloat) * positionData.size(), &positionData[0],
+                 GL_STATIC_DRAW);
+    glVertexAttribPointer(positionLocation, 2, GL_FLOAT, GL_FALSE, sizeof(GLfloat) * 2, nullptr);
+    glEnableVertexAttribArray(positionLocation);
+
+    glBindBuffer(GL_ARRAY_BUFFER, mVertexBuffers[1]);
+    glBufferData(GL_ARRAY_BUFFER, sizeof(GLfloat) * testFlagData.size(), &testFlagData[0],
+                 GL_STATIC_DRAW);
+    glVertexAttribPointer(testFlagLocation, 2, GL_FLOAT, GL_FALSE, sizeof(GLfloat) * 2, nullptr);
+    glEnableVertexAttribArray(testFlagLocation);
+
+    // Initialize second vertex array with first index buffer
+    glBindVertexArray(mVertexArrays[1]);
+
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mIndexBuffers[0]);
+
+    glBindBuffer(GL_ARRAY_BUFFER, mVertexBuffers[0]);
+    glVertexAttribPointer(positionLocation, 2, GL_FLOAT, GL_FALSE, sizeof(GLfloat) * 2, nullptr);
+    glEnableVertexAttribArray(positionLocation);
+
+    glBindBuffer(GL_ARRAY_BUFFER, mVertexBuffers[1]);
+    glVertexAttribPointer(testFlagLocation, 2, GL_FLOAT, GL_FALSE, sizeof(GLfloat) * 2, nullptr);
+    glEnableVertexAttribArray(testFlagLocation);
+
+    ASSERT_GL_NO_ERROR();
+
+    glBindVertexArray(mVertexArrays[0]);
+    glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, nullptr);
+    EXPECT_PIXEL_EQ(0, 0, 0, 255, 0, 255);
+
+    glBindVertexArray(mVertexArrays[1]);
+    glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, nullptr);
+    EXPECT_PIXEL_EQ(0, 0, 255, 0, 0, 255);
+
+    glBindVertexArray(mVertexArrays[0]);
+    glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, nullptr);
+    EXPECT_PIXEL_EQ(0, 0, 0, 255, 0, 255);
+
+    // Trigger the bug here.
+    glDeleteBuffers(1, &mIndexBuffers[2]);
+
+    glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, nullptr);
+    EXPECT_PIXEL_EQ(0, 0, 0, 255, 0, 255);
+
+    ASSERT_GL_NO_ERROR();
+}
+
+ANGLE_INSTANTIATE_TEST(DrawElementsTest, ES3_OPENGL(), ES3_OPENGLES());
+}